#668A5E
Closest named color: Slate Green (#658D6D). oklch(59.4% 0.077 139.9), rgb(102, 138, 94).
Aa
Black text reads best on this color (5.36:1).
About this color
#668A5E is a medium-dark, moderately saturated green. In OKLCH its lightness is 59%, its chroma 0.077 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Slate Green (#658D6D), ΔE 0.020 away. Black text reads best on it, at 5.36:1.
| Hue family | Greens |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.077) |
| Temperature | in between |
| Nearest name | Slate Green (#658D6D) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #668A5E |
| RGB | rgb(102, 138, 94) |
| HSL | hsl(109, 19%, 45%) |
| OKLCH | oklch(59.4% 0.077 139.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #668A5E | 3.91:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #668A5E | 5.36:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #668A5E text on white | 3.91:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #668A5E text on black | 5.36:1 | AA | Lc -35.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F4F6F3
oklch(97.1% 0.004 134.8)
-
Step 100
100
#E6ECE5
oklch(93.7% 0.011 141.3)
-
Step 200
200
#D2DDD0
oklch(88.6% 0.021 140.9)
-
Step 300
300
#B4C7B0
oklch(80.9% 0.038 140.2)
-
Step 400
400
#8DAA87
oklch(70.6% 0.059 140.3)
-
Step 500
500 (this color)
#668A5E
oklch(59.4% 0.077 139.9)
-
Step 600
600
#597F50
oklch(55.5% 0.082 139.7)
-
Step 700
700
#486C41
oklch(49.2% 0.078 140.4)
-
Step 800
800
#3C5835
oklch(42.8% 0.065 139.5)
-
Step 900
900
#33482F
oklch(37.6% 0.049 140.5)
-
Step 950
950
#1E2A1B
oklch(26.9% 0.032 139.4)
#668A5E with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #8D835B | 0.055 |
| Deuteranopia (no green cones) | #877F60 | 0.055 |
| Tritanopia (no blue cones) | #64877E | 0.050 |
| Achromatopsia (no color) | #818181 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #668A5E
#668A5E
oklch(59.4% 0.077 139.9)
- #93709B
#93709B
oklch(59.5% 0.076 320)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #668A5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate Green #658D6D ΔE 0.020
- Dark Sage #598556 ΔE 0.025
- Green Grey #77926F ΔE 0.039
- Light Forest Green #4F9153 ΔE 0.039
- Khaki Green #728639 ΔE 0.041
- Camo #7F8F4E ΔE 0.042
- Swamp #698339 ΔE 0.042
- Drab #828344 ΔE 0.043
Use #668A5E in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.